gpu: nova-core: Hopper/Blackwell: select FSP Chain of Trust version

The FSP Chain of Trust handshake is versioned: Hopper speaks version 1
and Blackwell speaks version 2. Provide the version through the FSP HAL
so the boot message carries the value FSP expects, and so chipsets that
do not use FSP need not express a version at all.

Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Eliot Courtney <ecourtney@nvidia.com>
Link: https://patch.msgid.link/20260603-b4-blackwell-v13-5-d9f3a06939e0@nvidia.com
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>

diff --git a/drivers/gpu/nova-core/fsp/hal.rs b/drivers/gpu/nova-core/fsp/hal.rs
index fc5ebb749c59f93f742707a27d8396dd539d4993..8aebe1800a64495b33d71a04a53df3b8e58a4698 100644 (file)
--- a/drivers/gpu/nova-core/fsp/hal.rs
+++ b/drivers/gpu/nova-core/fsp/hal.rs
@@ -9,19 +9,25 @@ use crate::{
     },
 };
 
+mod gb100;
 mod gb202;
 mod gh100;
 
 pub(super) trait FspHal {
     /// Returns the secure boot status from the architecture-specific `NV_THERM_I2CS_SCRATCH` register.
     fn fsp_boot_status(&self, bar: &Bar0) -> u32;
+
+    /// Returns the FSP Chain of Trust protocol version this chipset advertises.
+    #[expect(dead_code)]
+    fn cot_version(&self) -> u16;
 }
 
 /// Returns the FSP HAL, or `None` if the architecture doesn't support FSP.
 pub(super) fn fsp_hal(chipset: Chipset) -> Option<&'static dyn FspHal> {
     match chipset.arch() {
         Architecture::Turing | Architecture::Ampere | Architecture::Ada => None,
-        Architecture::Hopper | Architecture::BlackwellGB10x => Some(gh100::GH100_HAL),
+        Architecture::Hopper => Some(gh100::GH100_HAL),
+        Architecture::BlackwellGB10x => Some(gb100::GB100_HAL),
         Architecture::BlackwellGB20x => Some(gb202::GB202_HAL),
     }
 }

diff --git a/drivers/gpu/nova-core/fsp/hal/gb100.rs b/drivers/gpu/nova-core/fsp/hal/gb100.rs
new file mode 100644 (file)
index 0000000..d50aaba
--- /dev/null
+++ b/drivers/gpu/nova-core/fsp/hal/gb100.rs
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+// SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+
+use crate::{
+    driver::Bar0,
+    fsp::hal::FspHal, //
+};
+
+struct Gb100;
+
+impl FspHal for Gb100 {
+    fn fsp_boot_status(&self, bar: &Bar0) -> u32 {
+        // GB10x shares Hopper's FSP secure boot status register.
+        super::gh100::fsp_boot_status_gh100(bar)
+    }
+
+    fn cot_version(&self) -> u16 {
+        2
+    }
+}
+
+const GB100: Gb100 = Gb100;
+pub(super) const GB100_HAL: &dyn FspHal = &GB100;

diff --git a/drivers/gpu/nova-core/fsp/hal/gb202.rs b/drivers/gpu/nova-core/fsp/hal/gb202.rs
index 2f08b6c9f308f026278b02aa1ece5ab9da37804d..2bca76c8fd647cbcef683737d69027692d197181 100644 (file)
--- a/drivers/gpu/nova-core/fsp/hal/gb202.rs
+++ b/drivers/gpu/nova-core/fsp/hal/gb202.rs
@@ -17,6 +17,10 @@ impl FspHal for Gb202 {
             .fsp_boot_complete()
             .into()
     }
+
+    fn cot_version(&self) -> u16 {
+        2
+    }
 }
 
 const GB202: Gb202 = Gb202;

diff --git a/drivers/gpu/nova-core/fsp/hal/gh100.rs b/drivers/gpu/nova-core/fsp/hal/gh100.rs
index 290fb55a81da03e586108ab1640e40399d3c86ff..c38a7e96eb605deb40a26ae74dae8ca81c6545a3 100644 (file)
--- a/drivers/gpu/nova-core/fsp/hal/gh100.rs
+++ b/drivers/gpu/nova-core/fsp/hal/gh100.rs
@@ -11,11 +11,20 @@ use crate::{
 
 struct Gh100;
 
+/// Reads the FSP secure boot status from the Hopper/GB10x thermal scratch register.
+pub(super) fn fsp_boot_status_gh100(bar: &Bar0) -> u32 {
+    bar.read(regs::gh100::NV_THERM_I2CS_SCRATCH_FSP_BOOT_COMPLETE)
+        .fsp_boot_complete()
+        .into()
+}
+
 impl FspHal for Gh100 {
     fn fsp_boot_status(&self, bar: &Bar0) -> u32 {
-        bar.read(regs::gh100::NV_THERM_I2CS_SCRATCH_FSP_BOOT_COMPLETE)
-            .fsp_boot_complete()
-            .into()
+        fsp_boot_status_gh100(bar)
+    }
+
+    fn cot_version(&self) -> u16 {
+        1
     }
 }